I have been set email configuration under Web Gui : System Settting > Email Notifications. Then I set under : /opt/bitnami/apps/openproject/htdocs/config/configuration.yml, following instruction from : https://docs.bitnami.com/google/apps/openproject/. But when testing to send email I got error : "An error occured while sending mail (end of file reached)".

Thank you for fast reply, this is output when I test using telnet bitnami@debian:~$ sudo telnet smtp.gmail.com 465Trying 74.125.130.108...Connected to gmail-smtp-msa.l.google.com.Escape character is '^]'.Connection closed by foreign host.bitnami@debian:~$

Ok, so it seems that the SMTP server is accessible, so maybe the error is in the configuration.yml file, could you share here the contents? (please change any sensitive data) This way we could try to reproduce the issue.

By the way, parallel waiting the problem solution, how to hardcode make user status invited as active, so even system can't send invitation link to activate, I can manually activate new user, by now, I just using default user , but I need add other user. I can connect to mysql using phpnyadmin via tunneling with putty, but I can't see table related / store the user information.